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Ralph Bellamy as McCreary |
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Fay Wray as Diana |
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Frederick Vogeding as Von Boulton, a.k.a. Schlemmer |
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Esther Howard as Lily |
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Paul Page as Jackson |
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Trevor Bland as Waldridge |
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William J. Kelly as Dr. Chapman |
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Richard Alexander as Sailor (uncredited) |
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Kenneth MacDonald as Sailor (uncredited) |
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Paul McVey as Shipboard Party Guest (uncredited) |
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Florence Wix as Banquet Guest (uncredited) |
| Directing | Albert S. Rogell | Director |
| Writing | Jo Swerling | Screenplay |
| Camera | Joseph Walker | Director of Photography |
| Editing | Jack Dennis | Editor |
| Camera | Roy Davidson | Underwater Camera |
| Directing | Arthur S. Black Jr. | Assistant Director |
| Writing | Jo Swerling | Story |
| Sound | George Cooper | Sound |
